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When to go · Ireland

Ireland in September

Good month. Schools back, sea at its warmest, often settled weather: a strong month for driving the coast.

Key facts

Verdict
Good
Crowds
Medium
Ireland
Prices
Medium
Ireland

Verdict

GoodVoykit month rating for Ireland

Schools back, sea at its warmest, often settled weather: a strong month for driving the coast.

Is another month better than September?

September is rated good. These months rate higher:

Weather in September

  • Dublin and the east · Dublin, Wicklow, Boyne Valley, Kilkennyfine

    Driest part of the country; mild all year, rarely above 25 °C (77 °F) or below freezing.

  • West coast · Galway, Connemara, Clare, Mayo, Donegalfine

    Rain on most days, rarely all day; Atlantic storms in winter close cliff paths and island ferries.

  • South-west · Kerry, Dingle, West Corkbest weather

    Mildest winters (sub-tropical gardens) but high rainfall; the Ring of Kerry fills with coaches in July–August.

  • Aran Islands: Aran Islands · all three islands, Atlantic exposurebest weather

    May to September is the reliable window; summer ferries are most frequent then. Rain and wind arrive year round and can cancel sailings or flights.

  • Burren: Burren coast and plateau · Ballyvaughan, Doolin, Carran, Kilfenorabest weather

    Atlantic weather: rain in any month, wind on the coast, and the plateau can be several degrees colder than Ennis. May to June and September give the best odds; July and August are busiest and wettest.

  • East Coast and Midlands: Dublin and the east coast · Dublin, Louth, Wicklow coastbest weather

    Mild and changeable year-round; rain any month. May–June and September give the best odds of dry days.

  • East Coast and Midlands: Midlands · Kildare, Laois, Offaly, Westmeath, Longfordbest weather

    Colder and wetter than the coast in winter; bog and canal paths can be muddy after rain.

  • Northwest Ireland and Lakelands: Donegal and Sligo coast · Atlantic west and northweststorm or typhoon risk

    Wettest and windiest part of the region; rain arrives on any month, so pack a shell.

  • Northwest Ireland and Lakelands: Cavan, Monaghan and Leitrim · Inland lakelandsstorm or typhoon risk

    Slightly drier and calmer inland; lakes and waterways are best May to September.

  • Shannon Region: Shannon Region · Clare, Limerick, Tipperary lowlandsfine

    Atlantic weather: rain any month, mild winters, cool summers. May–Sep gives the longest days and the best odds; the Cliffs of Moher are often in cloud, so keep a spare day.

  • Southeast Ireland: Southeast lowlands · Carlow, Kilkenny, Waterford, Wexfordbest weather

    Drier and sunnier than the west; May–June and September are the picks. Beaches are busiest in July–August.

  • Southwest Ireland: Cork city and east · harbour and lowlandsstorm or typhoon risk

    Mild and wet year-round; rain arrives in bands, so a dry morning can turn by 14:00.

  • Southwest Ireland: Kerry mountains and peninsulas · Killarney, Dingle, Iveraghstorm or typhoon risk

    Wetter and windier than Cork; mist can drop on Mount Brandon and the passes within an hour.

  • West Ireland: Galway and the coast · Atlantic seaboardfine

    Rain year-round; May–September is mildest and driest, around 15–19 °C (59–66 °F). Winter days are short and windy.

  • Slightly colder and calmer than the coast; fog on lake roads in autumn mornings.

  • Dublin17 °C (63 °F) / 10 °C (50 °F), 12 rain days
  • Abbeyleix17 °C (63 °F) / 9 °C (48 °F), 11 rain days
  • Adare18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Annascaul17 °C (63 °F) / 10 °C (50 °F), 13 rain days
  • Ardmore, County Waterford18 °C (64 °F) / 11 °C (52 °F), 11 rain days
  • Arklow18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Arranmore16 °C (61 °F) / 11 °C (52 °F), 17 rain days
  • Ashbourne17 °C (63 °F) / 9 °C (48 °F), 11 rain days
  • Athenry18 °C (64 °F) / 10 °C (50 °F), 16 rain days
  • Athlone18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Athy18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Bagenalstown18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Bailieborough17 °C (63 °F) / 9 °C (48 °F), 12 rain days
  • Balbriggan17 °C (63 °F) / 10 °C (50 °F), 10 rain days
  • Ballina17 °C (63 °F) / 10 °C (50 °F), 17 rain days
  • Ballymahon17 °C (63 °F) / 10 °C (50 °F), 11 rain days
  • Ballymote17 °C (63 °F) / 10 °C (50 °F), 17 rain days
  • Ballyshannon16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Ballyvaughan17 °C (63 °F) / 10 °C (50 °F), 16 rain days
  • Baltimore18 °C (64 °F) / 11 °C (52 °F), 12 rain days
  • Banagher17 °C (63 °F) / 9 °C (48 °F), 11 rain days
  • Bantry18 °C (64 °F) / 11 °C (52 °F), 13 rain days
  • Belturbet17 °C (63 °F) / 9 °C (48 °F), 13 rain days
  • Birr18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Blarney18 °C (64 °F) / 10 °C (50 °F), 13 rain days
  • Blessington17 °C (63 °F) / 10 °C (50 °F), 11 rain days
  • Booterstown18 °C (64 °F) / 11 °C (52 °F), 10 rain days
  • Borris18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Boyle17 °C (63 °F) / 10 °C (50 °F), 16 rain days
  • Bray18 °C (64 °F) / 10 °C (50 °F), 10 rain days
  • Buncrana16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Bunratty18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Caherciveen18 °C (64 °F) / 11 °C (52 °F), 14 rain days
  • Cahir18 °C (64 °F) / 9 °C (48 °F), 12 rain days
  • Carlow18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Carndonagh16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Carraroe17 °C (63 °F) / 11 °C (52 °F), 16 rain days
  • Carrick-on-Shannon17 °C (63 °F) / 10 °C (50 °F), 15 rain days
  • Carrickmacross17 °C (63 °F) / 9 °C (48 °F), 12 rain days
  • Cashel18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Castlebar17 °C (63 °F) / 9 °C (48 °F), 17 rain days
  • Castlecomer17 °C (63 °F) / 9 °C (48 °F), 11 rain days
  • Castletownbere17 °C (63 °F) / 11 °C (52 °F), 13 rain days
  • Castletownshend17 °C (63 °F) / 11 °C (52 °F), 13 rain days
  • Cavan17 °C (63 °F) / 9 °C (48 °F), 15 rain days
  • Clara18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Clifden17 °C (63 °F) / 10 °C (50 °F), 17 rain days
  • Cloghane17 °C (63 °F) / 11 °C (52 °F), 15 rain days
  • Clogherhead17 °C (63 °F) / 10 °C (50 °F), 12 rain days
  • Clonakilty17 °C (63 °F) / 11 °C (52 °F), 12 rain days
  • Clones17 °C (63 °F) / 9 °C (48 °F), 14 rain days
  • Clonmacnoise18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Clonmel18 °C (64 °F) / 10 °C (50 °F), 12 rain days
  • Cobh17 °C (63 °F) / 11 °C (52 °F), 12 rain days
  • Cong17 °C (63 °F) / 10 °C (50 °F), 15 rain days
  • Cork18 °C (64 °F) / 11 °C (52 °F), 12 rain days
  • Crosshaven18 °C (64 °F) / 11 °C (52 °F), 11 rain days
  • Dalkey18 °C (64 °F) / 11 °C (52 °F), 10 rain days
  • Dingle17 °C (63 °F) / 11 °C (52 °F), 14 rain days
  • Donegal Town16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Doolin17 °C (63 °F) / 11 °C (52 °F), 15 rain days
  • Drogheda18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Drumshanbo17 °C (63 °F) / 9 °C (48 °F), 17 rain days
  • Dún Laoghaire18 °C (64 °F) / 11 °C (52 °F), 10 rain days
  • Dundalk17 °C (63 °F) / 9 °C (48 °F), 11 rain days
  • Dungarvan18 °C (64 °F) / 11 °C (52 °F), 11 rain days
  • Dungloe16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Dunmore East18 °C (64 °F) / 11 °C (52 °F), 12 rain days
  • Edenderry18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Ennis18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Enniscorthy18 °C (64 °F) / 12 °C (54 °F), 15 rain days
  • Enniscrone16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Enniskerry17 °C (63 °F) / 10 °C (50 °F), 11 rain days
  • Falcarragh16 °C (61 °F) / 10 °C (50 °F), 16 rain days
  • Fethard-on-Sea18 °C (64 °F) / 11 °C (52 °F), 11 rain days
  • Fethard18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Foynes19 °C (66 °F) / 11 °C (52 °F), 13 rain days
  • Freshford18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Galway16.3 °C (61 °F) / 10.9 °C (52 °F), 15 rain days
  • Glencolmcille16 °C (61 °F) / 10 °C (50 °F), 16 rain days
  • Glendalough17 °C (63 °F) / 9 °C (48 °F), 11 rain days
  • Glengarriff17 °C (63 °F) / 11 °C (52 °F), 14 rain days
  • Glenties16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Gorey18 °C (64 °F) / 11 °C (52 °F), 11 rain days
  • Gort18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Graignamanagh18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Howth18 °C (64 °F) / 11 °C (52 °F), 10 rain days
  • Inis Meáin17 °C (63 °F) / 11 °C (52 °F), 15 rain days
  • Inis Oírr17 °C (63 °F) / 11 °C (52 °F), 14 rain days
  • Inishbofin Island16 °C (61 °F) / 11 °C (52 °F), 16 rain days
  • Kells17 °C (63 °F) / 9 °C (48 °F), 12 rain days
  • Kenmare18 °C (64 °F) / 11 °C (52 °F), 14 rain days
  • Kildare17 °C (63 °F) / 9 °C (48 °F), 12 rain days
  • Kilkee17 °C (63 °F) / 11 °C (52 °F), 14 rain days
  • Kilkenny18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Killaloe18 °C (64 °F) / 10 °C (50 °F), 14 rain days
  • Killarney18 °C (64 °F) / 10 °C (50 °F), 14 rain days
  • Killorglin17 °C (63 °F) / 10 °C (50 °F), 14 rain days
  • Kilmallock18 °C (64 °F) / 10 °C (50 °F), 14 rain days
  • Kilmore Quay18 °C (64 °F) / 11 °C (52 °F), 10 rain days
  • Kinnitty17 °C (63 °F) / 9 °C (48 °F), 14 rain days
  • Kinsale17 °C (63 °F) / 11 °C (52 °F), 12 rain days
  • Knock17 °C (63 °F) / 10 °C (50 °F), 17 rain days
  • Lahinch17 °C (63 °F) / 11 °C (52 °F), 15 rain days
  • Leenane16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Leighlinbridge18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Letterfrack16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Letterkenny16 °C (61 °F) / 9 °C (48 °F), 17 rain days
  • Lifford17 °C (63 °F) / 9 °C (48 °F), 14 rain days
  • Limerick18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Lismore18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Listowel17 °C (63 °F) / 10 °C (50 °F), 15 rain days
  • Longford17 °C (63 °F) / 9 °C (48 °F), 12 rain days
  • Macroom18 °C (64 °F) / 10 °C (50 °F), 13 rain days
  • Malahide18 °C (64 °F) / 10 °C (50 °F), 10 rain days
  • Mallow18 °C (64 °F) / 10 °C (50 °F), 12 rain days
  • Manorhamilton16 °C (61 °F) / 9 °C (48 °F), 17 rain days
  • Maynooth18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Milltown Malbay17 °C (63 °F) / 11 °C (52 °F), 15 rain days
  • Monaghan17 °C (63 °F) / 9 °C (48 °F), 15 rain days
  • Mountmellick17 °C (63 °F) / 9 °C (48 °F), 12 rain days
  • Mountrath18 °C (64 °F) / 9 °C (48 °F), 12 rain days
  • Mullingar17 °C (63 °F) / 9 °C (48 °F), 11 rain days
  • Naas18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Navan17 °C (63 °F) / 10 °C (50 °F), 11 rain days
  • Nenagh18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • New Ross18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Newport, County Mayo16 °C (61 °F) / 10 °C (50 °F), 15 rain days
  • Oldcastle17 °C (63 °F) / 9 °C (48 °F), 12 rain days
  • Omey Island17 °C (63 °F) / 11 °C (52 °F), 15 rain days
  • Oranmore18 °C (64 °F) / 10 °C (50 °F), 17 rain days
  • Oughterard17 °C (63 °F) / 10 °C (50 °F), 17 rain days
  • Portarlington17 °C (63 °F) / 9 °C (48 °F), 12 rain days
  • Portlaoise17 °C (63 °F) / 10 °C (50 °F), 11 rain days
  • Portmagee17 °C (63 °F) / 11 °C (52 °F), 15 rain days
  • Portumna18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Roscommon17 °C (63 °F) / 9 °C (48 °F), 15 rain days
  • Roscrea18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Rosses Point16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Rosslare17 °C (63 °F) / 11 °C (52 °F), 11 rain days
  • Roundwood17 °C (63 °F) / 10 °C (50 °F), 11 rain days
  • Shannon18 °C (64 °F) / 10 °C (50 °F), 17 rain days
  • Skibbereen18 °C (64 °F) / 11 °C (52 °F), 12 rain days
  • Slane17 °C (63 °F) / 9 °C (48 °F), 11 rain days
  • Sligo16 °C (61 °F) / 10 °C (50 °F), 16 rain days
  • Spiddal17 °C (63 °F) / 10 °C (50 °F), 16 rain days
  • Strandhill16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Swords18 °C (64 °F) / 10 °C (50 °F), 10 rain days
  • Thomastown18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Thurles18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Tipperary18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Tory Island16 °C (61 °F) / 11 °C (52 °F), 17 rain days
  • Tralee18 °C (64 °F) / 11 °C (52 °F), 15 rain days
  • Tramore18 °C (64 °F) / 11 °C (52 °F), 11 rain days
  • Trim17 °C (63 °F) / 10 °C (50 °F), 16 rain days
  • Tuam18 °C (64 °F) / 10 °C (50 °F), 15 rain days
  • Tullamore18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Tullow18 °C (64 °F) / 9 °C (48 °F), 11 rain days
  • Virginia17 °C (63 °F) / 10 °C (50 °F), 13 rain days
  • Waterford18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Westport16 °C (61 °F) / 10 °C (50 °F), 17 rain days
  • Wexford17 °C (63 °F) / 11 °C (52 °F), 11 rain days
  • Wicklow18 °C (64 °F) / 10 °C (50 °F), 11 rain days
  • Youghal18 °C (64 °F) / 11 °C (52 °F), 11 rain days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Dublin Fringe Festival check

    September (check the dates) · Dublin

    Theatre and comedy; evening bookings get busy.

  • Culture Night check

    Third Friday in September (check) · Dublin

    Free events and late openings; queues at popular places.

  • Dublin Theatre Festival check

    Late September into October (check) · Dublin

    Ticketed shows; book early for the popular ones.

Crowds and prices

Crowds · Ireland
Medium
Prices · Ireland
Medium

Compare two months

Weather, crowds and prices for any two months in Ireland, side by side.

  • Verdict

    Sep: Good

    May: Great (better)

  • Crowds

    Sep: Medium

    May: Medium

  • Prices

    Sep: Medium

    May: Medium

  • Festivals listed

    Sep: 3

    May: 2

September: Schools back, sea at its warmest, often settled weather: a strong month for driving the coast.

May: Often the driest, sunniest month; Skellig trips start mid-May.

Ireland: figures are long-term averages from this guide, not a forecast.

What to pack

Nothing unusual for the weather this month.

Build the full packing list for your trip →

Where to go in September

Rated best or good this month